function [rid_grid, aid_grid] = readLKT(lkt_path, dem_par)
    
    if isstring(dem_par) || ischar(dem_par)
        dem_par = gamma.readDemPar(dem_par);
    end

    lkt_data = gamma.readComplexData(lkt_path, dem_par.m_size_x, dem_par.m_size_y, 'single');
    rid_grid = real(lkt_data);
    aid_grid = -1*imag(lkt_data);
end
